Getter container



Oct. 6, 1959 P. DELLA PORTA 2,907,451

GETTER CONTAINER Filed April 14, 1958 INVENTOR.

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United States Patent GETIER CONTAINER Paolo Della Porta, Milan, ItalyApplication April 14, 1958, Serial No. 728,208

6 Claims. (Cl. 206.4)

This invention refers to an improved container for getter material, ofthe kind as. described and claimed in my US. Patent No. 2,824,640. Thecontaineraccording to said patent is consisting of a circular, ovoidalor sin1ilarlyshaped tube or channel formed with a longitudinal openingor slit for the escape of the getter vapors therefrom.

According to one particular feature of said patent the container isformed with a wing along one side of the slit or opening, or is formedwith two wings, which wings have the purpose of directing the vaporsissuing from the slit or opening. In the case of one wing along one sideof the slit, the major part of the vapors issuing from the slit of thecontainer is directed in a direction which is substantially parallelwith the direction of the wing; a minor part of the vapors, is however,reflected by the surface of the wing and this minor part of the vaporsis directed in a direction which is quite diflerent from or evenopposite to the direction of the above said major part of the vapors.This reflection or deviation of a part of the vapors in a directionwhich is quite ditferent from the direction of the wing is happeningparticularly in the case in which the wing is inclined with respect ofthe natural direction of escape of the vapors from the slit or opening.The inclination of the wing has the purpose of directing the vapors in adirection which is difierent fromthe direction of the vertical axis ofthe container.

For certain uses of the getter containers in cathoderay-tubes (C.R.T.)for television the deposit of the getter vapors is required to belimited to a certain zone of the tube neck, or is required to bediflused onto the fluorescent screen of the tube. In the one and in theother case, any reflection or deviation of the getter vapors in adirection different from that required should be avoided. This resultcan be obtained neither with a container having one directional Wing,nor with a container having two wings or extended Walls, as shown anddescribed in my above said Patent No. 2,824,640. A

The above said inclined direction of the getter vapors, with respect ofthe vertical axis of the container, without reflection or deviation ofany part of the vapors in any other direction is obtained with theimproved getter container according to the present invention. Thiscontainer is consisting of a circular, ovoidal or similarly shapedchannel having both walls along the upwardly directed opening extendedover the part which is filled up with getter material, whereby both saidextended wall parts are bent with respect of the wall parts which arefilled up with getter material, so as to form a directive channel whichis inclined with respect of the vertical axis of the container and whichguides the vapors issuing from same in the desired inclined direction ina manner that no reflection or deviation of any part of the vapors inany other direction takes place.

The annexed drawing shows by way of example two embodiments of theimproved container according to this invention.

Patented Oct. 6, 1959 Figure 1 shows a circular getter container, invertical sectional view, formed by a channel A which is upside open andis filled up with getter material B The walls of the channel areextended upwardly and the extended parts a, a" of the walls are bentoutwardly with respect of the vertical axis of the container with acertain angle. In this way, the extended parts a, a, which in the caseof the figure are parallel to each other, are forming a directivechannel which is directed upwards and diverging from the axis of thecontainer from which the vapors are issuing in the direction of thearrows. No reflection or deviation of any part of the vapors in anyother direction takes place. The longer extended part a is that whichgives the direction to the vapors; the shorter extended part a" has thepurpose of avoiding downward reflection of part of the vapors by thesurface of part a.

Figure 2 shows a getter container like that shown in Figure l, with thediflerence that the extended wall parts a, a" of the channel A are bentinwardly with respect of the vertical axis of container with a certainangle, so as to form a directive channel which is directed upwards andconvergent to the axis of the container. In this case the extended parta" gives the direction to the vapors, whilst the extended part a avoidsdownward reflection or deviation of part of the vapors by the surface ofpart a".

Instead of being parallel to each other, as shown in Figures 1 and2,.the extended parts a, a can also be convergent or divergent to eachother, in order to obtain a major or minor concentrated flow of thevapors.

What I claim is:

1. A container for getter material comprising a channel shaped tubehaving opposing side Walls and a bottom wall connecting the side wallswithin which a body of getter material is packed, each of said sidewalls having an upper portion disposed above the getter material, saidupper portions of the side walls being in spaced apart, confrontingrelation and being offset from the side walls and forming a directivechannel for the getter vapors, said directive channel being in angularrelation with the body of getter material and with the vertical axis ofthe tube and one of said upper portions being higher than the other andhaving an undersurface forming a directive baflle for imparting anangular direction from theperpendicular to the getter vapors.

2. A container for getter material as claimed in claim 1, wherein theupper portions of the side walls are offset inwardly from the sidewalls.

3. A container for getter material as claimed in claim 1,

wherein the upper portions of the side Walls are oflset References Citedin the file of this patent UNITED STATES PATENTS Great Britain Sept. 7,1955 1,747,648 Ruben Feb. 18, 1930 2,126,686 Malloy .."Aug. 9, 19382,657,452 Veenemans et a1. Nov. 3, 1953 r FOREIGN PATENTS

